@book{41745,
	author = {Spencer, Herbert, and Spencer, Herbert,},
	title = {Primeros principios /},
	publisher = {Editorial Minimal,},
	year = {[2014]},
	series = {Colección Ensayos universales},
	address = {[Barcelona] :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/40307/}
}